diff --git a/README.md b/README.md
index b962e8e..3e6502d 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 <div align="center">
   <img width="500" style="max-width:100%" src="resource/static/brand.png" title="哪吒监控">
   <br><br>
-<img src="https://img.shields.io/github/workflow/status/naiba/nezha/Dashboard%20image?label=Dash%20v0.9.5&logo=github&style=for-the-badge">&nbsp;<img src="https://img.shields.io/github/v/release/naiba/nezha?color=brightgreen&label=Agent&style=for-the-badge&logo=github">&nbsp;<img src="https://img.shields.io/github/workflow/status/naiba/nezha/Agent%20release?label=Agent%20CI&logo=github&style=for-the-badge">&nbsp;<img src="https://img.shields.io/badge/Installer-v0.6.4-brightgreen?style=for-the-badge&logo=linux">
+<img src="https://img.shields.io/github/workflow/status/naiba/nezha/Dashboard%20image?label=Dash%20v0.9.6&logo=github&style=for-the-badge">&nbsp;<img src="https://img.shields.io/github/v/release/naiba/nezha?color=brightgreen&label=Agent&style=for-the-badge&logo=github">&nbsp;<img src="https://img.shields.io/github/workflow/status/naiba/nezha/Agent%20release?label=Agent%20CI&logo=github&style=for-the-badge">&nbsp;<img src="https://img.shields.io/badge/Installer-v0.6.4-brightgreen?style=for-the-badge&logo=linux">
   <br>
   <br>
   <p>:trollface: <b>哪吒监控</b> 一站式轻监控轻运维系统。支持系统状态、HTTP(SSL 证书变更、即将到期、到期)、TCP、Ping 监控报警，命令批量执行和计划任务。</p>	
diff --git a/cmd/dashboard/controller/member_api.go b/cmd/dashboard/controller/member_api.go
index e0be4f9..c8d7fe7 100644
--- a/cmd/dashboard/controller/member_api.go
+++ b/cmd/dashboard/controller/member_api.go
@@ -277,16 +277,20 @@ func (ma *memberAPI) addOrEditCron(c *gin.Context) {
 		return
 	}
 
+	cr.CronID, err = dao.Cron.AddFunc(cr.Scheduler, dao.CronTrigger(cr))
+	if err != nil {
+		c.JSON(http.StatusOK, model.Response{
+			Code:    http.StatusBadRequest,
+			Message: err.Error(),
+		})
+		return
+	}
+
 	dao.CronLock.Lock()
 	defer dao.CronLock.Unlock()
 	crOld := dao.Crons[cr.ID]
 	if crOld != nil && crOld.CronID != 0 {
-		dao.Cron.Remove(crOld.CronID)
-	}
-
-	cr.CronID, err = dao.Cron.AddFunc(cr.Scheduler, dao.CronTrigger(cr))
-	if err != nil {
-		panic(err)
+		dao.Cron.Remove(cron.EntryID(crOld.ID))
 	}
 
 	delete(dao.Crons, cr.ID)
diff --git a/cmd/dashboard/main.go b/cmd/dashboard/main.go
index 7328fa8..12e33c6 100644
--- a/cmd/dashboard/main.go
+++ b/cmd/dashboard/main.go
@@ -61,9 +61,15 @@ func initSystem() {
 	loadCrons()   //加载计划任务
 
 	// 清理 服务请求记录 和 流量记录 的旧数据
-	dao.Cron.AddFunc("0 20 3 * * *", cleanMonitorHistory)
+	_, err := dao.Cron.AddFunc("30 3 * * *", cleanMonitorHistory)
+	if err != nil {
+		panic(err)
+	}
 	// 流量记录打点
-	dao.Cron.AddFunc("0 0 * * * *", recordTransferHourlyUsage)
+	_, err = dao.Cron.AddFunc("0 * * * *", recordTransferHourlyUsage)
+	if err != nil {
+		panic(err)
+	}
 }
 
 func recordTransferHourlyUsage() {
diff --git a/service/dao/dao.go b/service/dao/dao.go
index bf29ea7..fffd151 100644
--- a/service/dao/dao.go
+++ b/service/dao/dao.go
@@ -13,7 +13,7 @@ import (
 	pb "github.com/naiba/nezha/proto"
 )
 
-var Version = "v0.9.5" // ！！记得修改 README 中的 badge 版本！！
+var Version = "v0.9.6" // ！！记得修改 README 中的 badge 版本！！
 
 var (
 	Conf  *model.Config
diff --git a/service/dao/servicesentinel.go b/service/dao/servicesentinel.go
index 6f09a47..e782e77 100644
--- a/service/dao/servicesentinel.go
+++ b/service/dao/servicesentinel.go
@@ -71,7 +71,10 @@ func NewServiceSentinel() {
 	go ServiceSentinelShared.worker()
 
 	// 每日将游标往后推一天
-	Cron.AddFunc("0 0 * * * *", ServiceSentinelShared.refreshMonthlyServiceStatus)
+	_, err := Cron.AddFunc("* * * * *", ServiceSentinelShared.refreshMonthlyServiceStatus)
+	if err != nil {
+		panic(err)
+	}
 }
 
 /*
@@ -92,13 +95,13 @@ type ServiceSentinel struct {
 	monitors                            map[uint64]model.Monitor
 	sslCertCache                        map[uint64]string
 	// 30天数据缓存
-	monthlyStatusLock sync.RWMutex
+	monthlyStatusLock sync.Mutex
 	monthlyStatus     map[uint64]*model.ServiceItemResponse
 }
 
 func (ss *ServiceSentinel) refreshMonthlyServiceStatus() {
 	ss.monthlyStatusLock.Lock()
-	defer ss.monitorsLock.Unlock()
+	defer ss.monthlyStatusLock.Unlock()
 	// 将数据往前搦
 	for _, v := range ss.monthlyStatus {
 		for i := 0; i < len(v.Up)-2; i++ {
@@ -195,16 +198,9 @@ func (ss *ServiceSentinel) LoadStats() map[uint64]*model.ServiceItemResponse {
 	// 刷新最新一天的数据
 	ss.serviceResponseDataStoreLock.RLock()
 	defer ss.serviceResponseDataStoreLock.RUnlock()
-	ss.monthlyStatusLock.RLock()
-	defer ss.monthlyStatusLock.RUnlock()
+	ss.monthlyStatusLock.Lock()
+	defer ss.monthlyStatusLock.Unlock()
 	for k := range ss.monitors {
-		if ss.monthlyStatus[k] == nil {
-			ss.monthlyStatus[k] = &model.ServiceItemResponse{
-				Up:    new([30]int),
-				Down:  new([30]int),
-				Delay: new([30]float32),
-			}
-		}
 		ss.monthlyStatus[k].Monitor = ss.monitors[k]
 		v := ss.serviceStatusToday[k]
 		ss.monthlyStatus[k].Up[29] = v.Up